Expanding portal haematomata as a complication of knee arthroscopies in persons with haemophilia.

Recurrent haemarthroses stimulate the hypertrophy of synovial tissues that if left in situ will eventually cause joint destruction. Synovectomies have been the cornerstone of joint preservation and a number of different methods exist. We report two patients who suffered complications after an arthroscopic procedure. No previous complications of this nature have been reported in the literature.